信息战条件下水面舰艇编队通信网络技术发展与分析

本文分析了信息战条件下,水面舰艇及编队通信能力的需求,我国水面舰艇通信系统发展现状及弱点,提出了水面舰艇编队通信网络技术发展思路、方案构想,给出了水面舰艇通信系统配置示意图。     

改善水面舰艇舱室空气品质的技术思考

简要分析了国内水面舰艇舱内主要污染物类型，介绍了国内外空气净化技术的主要优缺点及其在水面舰艇上的应用现状与前景，并提出了改善我国水面舰艇舱室空气品质的相关可行性技术方案。     

水面舰艇总体技术发展研究

阐述了水面舰艇总体技术在海军装备发展中的地位和作用,回顾了水面舰艇总体技术的发展历程,在分析其主要构成以及信息时代海上作战特点的基础上,提出信息时代对水面舰艇总体技术的发展要求.     

一种水面舰艇作战信息交换仿真模拟系统设计与实现

随着武器装备技术的不断发展,水面舰艇作战系统各类子系统之间信息交互频繁,交互流程直接影响水面舰艇作战效能。以水面舰艇典型作战任务为牵引,分析水面舰艇作战系统子系统内部信息交互流程,设计了一套水面舰艇作战信息交换仿真模拟系统,能够对水面舰艇主要作战系统的信息交互过程进行模拟和展示,对于优化舰艇作战系统信息交互流程具有一定意义。     

水面舰艇模块划分方法

模块化技术是水面舰艇设计的一个重要发展方向，研究的基本问题是如何对水面舰艇模块进行分解。通过对对象分类的剖析，将该方法应用到了水面舰艇模块划分的原理之中。按总段、系统二个面属性对水面舰艇顶层模块进行了顶层划分，并给出了舰艇结构、动力推进、辅助系统、舰船电气、船舶装置和作战系统子层的模块划分。指出了水面舰艇模块类别、层次及模块划分对水面舰艇设计、建造的影响，为水面舰艇模块化设计及建造奠定了基础。     

雷达隐身技术在水面舰艇中的应用

雷达隐身技术的应用是现代化水面舰艇发展的必然趋势,尤其是在现代探测与导弹技术不断进步的背景下,舰艇自身防御难度也加大了,舰艇雷达波隐身技术的应用受到各国海军的重视。文章以对水面舰艇RCS及雷达隐身技术的重要性分析为基础,构建了水面舰艇雷达波隐身设计体系,并重点探讨了外形隐身与雷达吸波材料隐身两种雷达散射截面减缩技术,以期为水面舰艇的雷达波隐身设计改进与完善提供参考。     

水面舰艇集成天线隐身设计技术

阐述了水面舰艇雷达波隐身设计的主要技术措施,强调了发展集成天线技术对提高舰艇隐身性的重要意义,介绍了国外舰艇集成上层建筑的发展动向,提出了未来水面舰艇电子系统,特别是通信系统的集成天线隐身设计的基本设想.     

关于水面舰艇雷达波隐身技术发展思考

借鉴国外先进舰艇雷达波隐身技术发展,研究国外水面舰艇技术发展状况及特点,分析其发展趋势,并给出我国水面舰艇雷达波隐身技术发展启示,为我国水面舰艇的雷达波隐身技术发展提供参考.     

水面舰艇运动仿真模型研究

水面舰艇运动仿真模型是水面舰艇模型的重要组成部分。文章分析了水面舰艇的运动,以及不同级别的作战仿真应用对水面舰艇运动仿真模型的要求,给出了水面舰艇的实体态势递推模型,对水面舰艇运动仿真模型进行了初步的研究。     

雷达隐身技术在水面舰艇上的应用

由于探测水面舰艇的雷达性能不断提升,严重威胁了水面舰艇的生存能力,世界各军事大国正在研究如何将雷达隐身技术应用于水面舰艇。通过文献调研和动态跟踪发现,水面舰艇主要面临4类雷达探测威胁,而未经过隐身设计的舰艇的雷达散射截面很大。舰艇经过隐身设计后,在作战中能缩短敌方雷达探测距离,降低敌方目标识别能力,有效增强干扰效果,具有很强的战术意义。目前,水面舰艇主要通过精确的外形设计和隐身材料2种技术途径实现雷达隐身。     

基于多Agent的反潜水面舰艇仿真平台模块化设计

为了满足仿真系统中智能兵力的智能性和反潜战军事领域仿真资源的可重用性要求,针对现代水面舰艇反潜作战特点和系统设计的新需求,结合模块化建模和多Agent建模2种方法,从宏观和微观角度对水面舰艇仿真平台进行了功能分析;划分了舰艇平台系统模块,建立了舰艇平台层次多Agent模型;利用XML技术在HLA基础上进行了水面舰艇平台的联邦成员设计,分析了联邦成员信息交互关系,完成了各种Agent的构造和决策设计。从而满足了系统仿真粒度的需求,提高了系统仿真平台模型资源可重用性、灵活性和可扩展性。     

船舶制造技术成熟度评估系统

在船舶制造中,技术成熟度的评估意识薄弱且缺少信息化手段。通过确定评估指标、设定权重,建立船舶制造技术成熟度评估系统,由系统计算成熟度的得分和等级,从总体设计、建造工艺、船厂建造资源能力、船舶研制定型后等方面进行评估。该系统可减少返工带来的时间成本、人力成本,提高船舶制造技术成熟度评估的科学性、准确性、可靠性、灵活性及效率。     

船后喷水推进器水下辐射噪声源脉动流场的数值计算

为避免尺度效应对噪声性能的影响,文章研究探索了在实尺度条件下装船后喷水推进器噪声声源的数值计算方法。首先,基于分离涡模型对国外某喷水推进泵内部非定常流场进行了数值模拟,将计算得到的不同转速下泵的功率值与厂商提供数据进行对比,最大误差在2.0%以内,验证了数值计算方法的准确性和有效性。其次,完成了实尺度条件下某"船体+喷水推进泵+进水流道"系统带自由液面的非定常流场的数值计算。提取了实船条件下喷水推进器流道进口处的不均匀速度场,将其加载到单个喷水推进器数值计算模型的进口边界。进而,采用分离涡模型对该船后"喷水推进泵+进水流道"内部非定常流场脉动压力进行数值计算,分析了各个特征截面压力脉动的频域特性,为下一步准确计算喷水推进器噪声提供了有效的脉动流场信息。     

大平岛围垦工程对航道、码头影响研究

基于工程海域条件分析,建立了平面二维潮流泥沙数学模型。在实测资料验证良好的基础上,对大平岛围垦工程前、后的潮流、悬沙场等进行了模拟,就工程对围区附近航道、码头的影响进行了分析研究。研究表明,本工程的实施对周边海域没有大范围的根本性影响,其影响主要集中在西侧水道的局部水域,会使处于围区西侧水道的燕山热电厂煤码头及其航道等产生淤积,建议定期疏浚或采取其它工程措施。     

Formation of Denmark Strait overflow water and its hydro-chemical composition

The dense overflow across the Denmark Strait is investigated with hydrographic and hydro-chemical data and the water mass composition of the Denmark Strait Overflow Water (DSOW) is determined by multivariate analysis. Hydrographical properties, the transient tracers CFC-11 and CFC-12, oxygen and nutrients are utilized for the water mass definitions. Distribution and characteristics of water masses north of Denmark Strait are described, the important water masses at the sill and the variability on weekly time-scales are discussed, and the entrainment and mixing of water into the overflow plume in the northern Irminger Basin is calculated. The analysis indicates that water masses both from the Nordic Seas and the Arctic Ocean are important for the formation of DSOW. It is found that water masses transported with the East Greenland Current make up about 75% of the overflow at the sill. The overflow at, and shortly south of, the sill is inhomogeneous with a low-salinity component dominated by Polar Intermediate Water. The high-salinity component of the overflow is mainly of Arctic origin. The water mass composition, and the short-term variability for 7 repeats of sections close to the sill are described, and these illustrate that the overflow is in fact a composite of a number of water masses with different formation and transport histories. This indicate that the overflow is a robust feature, but that it responds to variations in the circulation or atmospheric forcing that influences the formation of intermediate and deep water masses within the Arctic Mediterranean and the North Atlantic. At a section about 400 km south of the sill the overflow is well mixed and modified by entrainment of, mainly, Iceland–Scotland Overflow Water and Labrador Sea Water, together constituting 30% of the overflow plume. The entrainment of Middle Irminger Water dominates shortly downstream of the sill, before the overflow plume reaches too deep but the entrainment seems to be intermittent in time.     

船闸自动控制系统的养护与检修

以连云港市盐灌船闸为例,对船闸自动控制系统应用一年来PLC的运行环境、日常维护、故障检修等进行总结,对水位计、限位开关等主要电气元器件的养护与优化进行分析,并对船闸液压、机械设备日常维护和常见故障处理进行探讨.总结了船闸自动控制系统的养护与检修方法.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.     

BIM技术在航道建设中的作用

航道工程具有施工工期长、施工影响因素多等特点。在航道工程的设计、施工、维护的各个阶段,随着对精细化管理的需求日趋提高,传统的实施方法已不能满足工程的强度与精度要求。从航道工程和BIM的特性入手,探讨了BIM技术在航道工程设计、施工、维护等各阶段的应用。在保证设计合理性的前提下,可通过BIM模型完成设计意图的表达与传递,从而保证航道工程的施工质量,以及后续维护阶段航道整治建筑物安全、稳定地发挥其作用。     

船用非金属材料的石棉检测探究

国际上对船用非金属材料无石棉的要求越来越高,中国是造船大国和修船大国,对此应高度重视.采用GB/T 23263-2009标准,运用X射线衍射仪(XRD)和偏光显微镜(PLM)联合检测的方法对石棉进行定性定量分析是比较适当的.文章分析了石棉检测的标准和判定依据,制定了取样原则,并针对相关问题提出了改进的建议.     

丁坝群坝田与主流水沙交换与冲淤机理综述

丁坝群不同平面布置方案下坝田与主流间的泥沙交换和地形变化是长江口深水航道回淤机理及减淤措施研究的重要内容,但以往研究不多。坝田与主流的泥沙交换及地形变化与紊流结构及时均流场有关,即与坝田-主流主界面混合层的大尺度相干结构和坝田内时均大尺度环流有关。在出水丁坝和淹没丁坝情况下坝田与主流的质量交换系数变化不大,约为0. 02左右。坝田不存在悬沙的平衡剖面(Rouse分布),悬沙和底沙均存在指向坝田的净输沙。坝田淤积达到准平衡状态需要5～6 a,但基本上在前2 a就达到了平衡。